It seem to me more out of the 60s counter culture ethos of liberation: sexual liberation, personal liberation & hedonism (do it if it feels good), moral relativism & value creation (the real Nietzschean deal), etc. It's the “Don’t let authority figures like the “Establishment” or Church tell you otherwise, man” indoctrination hippie kit, but for kids who like LOTR, Narnia and Harry Potter. However, if it was truly Nietzschean the movie wouldn't want converts or students... Zarathrustra certainly didn't. As well, Nietzsche wanted aristocrats not hippies. This seems to be more about the continuing rise of secular liberalism of the left at the expense of the church. A liberation theology first started by Marxists and adopted by hippies and Hollywood.
It’s an irony in Nietzsche himself . . . if he really believed his own philosophy why was he bothering to write it out at all? To help us? Altruism? He should have been dominating others or whatever the superman he envisioned would do.